Spectrum Computing

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The (fixed) ZX81 version…

https://sinclairzxworld.com/viewtopic.p ... 938#p52938

you can also buy a tape at cronosoft

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In december I started a contest to make a version of Game of Life on the ZX Spectrum in the shortest code possible. The contest ran until Easter 2024. The rules for the sizecoding contest 1) The rules of GAME OF LIFE must be followed: a) Any live cell with fewer than two live neighbours dies, as if ...

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WE HAVE A WINNER!!!!! This is a short announcement first. I am working on a full reply but..... The response was low..... 2 entries in the contest. TOM DALBY is the winner with a version in 166 bytes Peter Featherstone is second with a version in 333 bytes , so double the size. Tom's version comes c...

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@MustardTiger

sorry for the late reply.

Although officially closed I will allow you to sent in the program this week
due to your question in february.

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DEC SP/INC SP are silly instructions too. It would be loads better if it decremented/incremented by 2, changing by 1 has no use I can think of, since you always push a word to the stack. If it incremented by 2 it would just be like discarding the value on the top of the stack (I usually use POP AF ...

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0x40 LD B,B 0x49 LD C,C 0x52 LD D,D 0x5B LD E,E 0x64 LD H,H 0x69 LD L,L 0x79 LD A,A It is not just the Z80 but also the hardware. On a ZX81 I can use these opcodes to hide data on the screen and the hardware will just display a space. An example... A snake game with inverted screen and white snake....

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Manic Miner is the first I saw.

Screen from Moon Cresta rocketfire.

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equinox wrote: ↑Thu Feb 15, 2024 6:27 pm Hmm, perhaps now we need a kalsarikännit simulator (Finnish word for hanging around in one's underwear boozing).

The CSSCGC can never have enough simulators.
I think that each year has at least 1 simulator.

I even won once with a simulator as did other simulators.

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My ACES project started in 2011. Got a hard bug that stopped the project. In 2016
the bug was solved but the original idea is partly lost.

Still did some progress but project is again on hold since 2020.

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Now reviewed some background info https://www.bbc.com/travel/article/20230522-the-dutch-solution-to-busyness-that-captivated-the-world BTW the screen is just a drawing from internet altered with software into a scr. The program took me yesterday evening. So still time enough to do nothing afterwards.

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I just sent in
"The Dutch Art Of Doing Nothing A.K.A. 'NIKSEN'-Simulator"

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I downloaded it for a quick look and to add to the DB, and found myself playing a few games. That's a sign of a decent Minesweeper :) In fact this is a rare case of a Speccy licence that is mostly free of howlers. Quite a lot, it starts to look like BOMBER. All version (also the ZX81 version) can b...

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You can use the memory tab and in the address input you can simply input the address and see what is there.

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Oh, thank you! That's exactly what I was suspecting, so I guess I'll quit Spectaculator and download ZXSpin instead! :) Or find out how Spectaculator works with tap-files. I can do the same with other emulators. In my video how 48 KRAAK works I use Z80. https://www.youtube.com/watch?v=j9O53I4tlTU

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Thank you for this I have it partially working. I can’t get it to work at all when I launch Spin using Notepad++ macros to both assemble the opcodes into an .asm file using Pasmo assembler and then launch spin and automatically load the asm file. I can use it if I load that same file produced by Pa...

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Here is a video how the conversion works.

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ZX Spin, just TOOLS DEBUGGER and set BREAKPOINT.

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I coded many games but nit really released.
I gave copies to friends but that is it.

I made 48K Kraak which was for sale on a local market for a while but no official
softwarehouse for the release.

With internet I coded more games and now today some games are still for sale at cronosoft.

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catmeows wrote: ↑Sun Jan 21, 2024 10:47 am The practical examples I see quite often:

Less common practices seen mostly in decryptors and etc:

5) XOR decryptors overwriting itself

Test for a different real key pressed

Code: Select all

keyrd:
     ld a,(23560)
keyt cp 0
     jr z,keyrd
     ld (keyt+1),a ; save latest key pressed
[\code]

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I once had to test a system as a user. In a database: You could do a selection and a sort. The programmer first did the sort and then he selected the items he needed. I suggested to do it the other way around, thus only sorting the selected records. He was not amused and asked if I could be taken of...

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Ohhh come on... you just post the code here so we can do your job for this week. :P :dance :P Since we are now discussing bloated code... here's another routine I had to fix in production: public OpenItem getPaymentNotMade(Collection payments) { final List paymentsAsList = new ArrayList(payments); C...

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https://worldofspectrum.net/item/0034814/

https://zxart.ee/eng/software/game/boar ... hesskelet/

played the version from zxart and opponent just lost a Knight suddenly.
E2E3 (made an error move, had to be E4)
E3E4 (now as if playing black)
C2C4
D1F3

Error can be repeated

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I love stuff like this, when I was a teenager I applied for a job programming Gameboy colour/advance games and was asked to make a bomber man game in under 500 bytes. I managed it and still didn't get the job because I didn't include the Nintendo logo, so the game didn't run on real hardware - but ...

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Sorry, I'm not quite understanding this. IM1 will do the update, so you can check the update without an intruptroutine. In case your code misses an intrupt you can use this test ld hl,23672 : 50th time counter ld a,(hl) sub 50 jr c,nosec ld (hl),a ; new start counter ld hl,seccount inc(hl) nosec

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here....

viewtopic.php?p=134352#p134352

Spectrum Computing

Search found 381 matches

Re: The 8-bits War

Official result Game of Life -contest

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Re: Game of Life sizecoding contest

Re: Zilog's Z80 opcode choice

Re: Zilog's Z80 opcode choice

Re: Games that made good use of FLASH

Re: C.S.S.C.G.C 2024 is/will be/has open/ing/ed

Re: How big should new Speccy games be? 48k? Bigger? Release 2 versions?

Re: C.S.S.C.G.C 2024 is/will be/has open/ing/ed

Re: C.S.S.C.G.C 2024 is/will be/has open/ing/ed

Re: Minesweeper

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Re: Z80 assembly development environment recommendations

Re: PROJECT : A TRS80 MC10 emulator on the ZX Spectrum

Re: Z80 assembly development environment recommendations

Re: Looking for bedroom coders / developers who in the 80s worked on ZX Spectrum or Sam Coupé games

Re: How much self modifying code was there and did it do anything?

Re: The code so bad you won't hire

Re: The code so bad you won't hire

Re: Chesskelet revamped - 269 bytes

Re: Chesskelet revamped - 269 bytes

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Re: Best way to fill screen in basic?